rock-salt

A miner chips a large chunk of rock-salt from a cavern wall.

Definition

1. Noun:
   • A naturally occurring crystalline form of sodium chloride (NaCl): "rock-salt" refers to the mineral form of common salt, typically found in large underground deposits and often used for de-icing roads or in food preservation.

Usage Examples

• (Using the mineral form of salt for de-icing.)
• (Referring to the natural mineral resource.)

Advanced Usage

• "rock-salt crystals": large, transparent or translucent cubic crystals of sodium chloride.

  • The geologist collected rock-salt crystals from the salt dome for analysis. (Large natural salt crystals.)

• "rock-salt mine": a location where rock-salt is extracted from the earth.

  • The rock-salt mine in Poland is a popular tourist attraction. (A mine dedicated to extracting this mineral.)

Variants and Related Words

• Halite (n): the mineralogical name for rock-salt.

  • Halite is a common evaporite mineral found in arid regions. (The scientific term for rock-salt.)

• Sodium chloride (n): the chemical compound that constitutes rock-salt.

  • Sodium chloride is essential for human health but excessive intake can be harmful. (The chemical composition of rock-salt.)

Synonyms

• Halite: a mineral consisting of sodium chloride.
• Common salt: the ordinary table salt, though table salt is usually refined.
• Fossil salt: an older term for rock-salt.

Idioms

• "worth one's salt": to be competent or deserving of respect (derived from the historical value of salt).
  • Any good worker is worth their salt. (Deserving of pay or respect, referencing salt's value.)

Related Phrasal Verbs

• Salt away: to save or store something, especially money (though not directly related to rock-salt, it derives from the preserving property of salt).
  • He salted away a portion of his salary each month. (Saved money, as if preserving it with salt.)